Boating Right of Way Rules: Give-Way & Stand-On Vessels

Last reviewed May 2026 · Reviewed by the West Marine Technical Team — boating safety specialists with hands-on experience in USCG navigation rules for recreational, coastal, and offshore vessel operation.

Unlike road traffic, boats operate in an environment without lane markings, stop signs, or traffic signals. The USCG Navigation Rules — based on the International Regulations for Preventing Collisions at Sea (COLREGs) — establish who has the right of way in every encounter between vessels. Understanding these rules prevents collisions and is required knowledge for anyone operating a recreational boat on U.S. waters. This guide covers the give-way and stand-on vessel framework, the three types of vessel encounters, overtaking rules, sailboat vs. powerboat right of way, and passing rules. For the full legal text of the navigation rules, see the USCG Navigation Rules handbook. For required safety equipment, see the boat safety equipment checklist.

Give-Way and Stand-On Vessels: The Core Framework

What the give-way vessel must do

In any encounter between two vessels, one vessel is designated the give-way vessel and one is designated the stand-on vessel. The give-way vessel is required to take early and substantial action to keep well clear of the stand-on vessel. Early means before the situation becomes a close-quarters problem — not a last-second turn. Substantial means a maneuver large enough that the other vessel can clearly see that action is being taken. The give-way vessel should not make small course alterations or speed reductions that the stand-on vessel cannot observe and interpret as a collision-avoidance maneuver. A large alteration to starboard — turning right — is the preferred give-way maneuver in most crossing situations because it is the most visible and predictable action to the stand-on vessel.

What the stand-on vessel must do

The stand-on vessel is required to maintain its course and speed to allow the give-way vessel to maneuver around it predictably. A stand-on vessel that changes course or speed unexpectedly makes the give-way vessel's job harder and can create a collision situation that would not have existed if the stand-on vessel had held its course. The stand-on vessel has one exception to this requirement: if it becomes apparent that the give-way vessel is not taking action and a collision is imminent, the stand-on vessel must take whatever action is best to avoid collision — including maneuvering. The right of way is not an absolute right to proceed regardless of circumstances. Every vessel has the ultimate responsibility to avoid collision.

The responsibility that overrides all rules

Navigation Rule 2 — the Rule of Responsibility — states that nothing in the navigation rules shall exonerate any vessel, or the owner, master, or crew of any vessel, from the consequences of neglect to comply with the rules, or of neglect of any precaution required by the ordinary practice of seamen. In plain terms: you cannot cause a collision and then claim the right of way as a defense. The give-way and stand-on framework determines who maneuvers, but both vessels are always responsible for collision avoidance. A stand-on vessel that holds its course into a collision when it had room and time to avoid it has not complied with the rules.

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The Three Meeting Situations

Head-on situation

When two power-driven vessels are meeting head-on or nearly head-on — approaching each other on reciprocal or nearly reciprocal courses — both vessels are required to alter course to starboard so that each passes on the port side of the other. Neither vessel has the right of way in a head-on situation: both are give-way vessels, and both must turn right. The rule applies when there is any doubt about whether the situation is head-on — if you can see both sidelights of the approaching vessel at night, or if the vessel is directly ahead of you in daylight, treat it as a head-on situation and alter to starboard. A small alteration is not sufficient — the course change must be large enough that the other vessel can clearly see you have altered to starboard.

Crossing situation

When two power-driven vessels are crossing so as to involve risk of collision, the vessel that has the other on its starboard side is the give-way vessel and must keep out of the way. The vessel that has the other on its port side is the stand-on vessel and must maintain course and speed. A simple way to remember this: if you see a vessel on your right side and your courses will converge, you give way. If the vessel is on your left, you are the stand-on vessel and hold your course. In practice, the give-way vessel should alter course early and substantially to starboard — passing behind the stand-on vessel — rather than attempting to cross ahead of it.

Overtaking

A vessel overtaking another vessel must keep out of the way of the vessel being overtaken, regardless of what types of vessels are involved. The overtaking rule supersedes the vessel hierarchy described below — a sailing vessel overtaking a power-driven vessel must give way to the power vessel it is overtaking. The navigation rules define an overtaking vessel as one coming up on another from a direction more than 22.5 degrees abaft the beam — that is, from a direction that is more toward the stern than the side. If you are approaching another vessel from behind and are in doubt about whether you are overtaking, assume you are and give way accordingly. The overtaken vessel is the stand-on vessel and must maintain course and speed.

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Overtaking Rules

When you are the overtaking vessel

You are the overtaking vessel — and must give way — when you are approaching another vessel from a direction that is more than 22.5 degrees abaft its beam. At night, this means you can see only the white stern light of the vessel ahead of you, not either sidelight. In daylight, if you are approaching from directly behind or from a shallow angle behind the beam, you are overtaking. The overtaking vessel may pass on either side of the vessel being overtaken — to port or to starboard — but must keep clear throughout the overtaking maneuver. On a river or narrow channel, sound signals are required before overtaking.

Overtaking vessel stays give-way until clear

One boat is overtaking another — which boat must give way? The overtaking vessel remains the give-way vessel for the entire duration of the overtaking maneuver, until it is finally past and clear of the overtaken vessel. There is no point during the overtake where the overtaking vessel becomes the stand-on vessel. If the two vessels' situation changes — if the overtaking vessel moves far enough ahead that the situation transitions to a crossing situation — the crossing rules then apply. Until that point, the overtaking vessel must keep clear.

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Sailboat vs. Powerboat Right of Way

When a motorboat is approaching a sailboat

A vessel under sail — one using sails only, with no engine running — generally has the right of way over a power-driven vessel. When a motorboat is approaching a sailboat head-on, the motorboat is the give-way vessel and must alter course to keep clear. When a motorboat is approaching a sailboat in a crossing situation, the motorboat is the give-way vessel regardless of which side the sailboat is on — because the vessel under sail outranks the power-driven vessel in the vessel hierarchy. The motorboat is the stand-on vessel only in two cases: when it is being overtaken by a sailing vessel, or when the sailing vessel is operating under engine power and is therefore classified as a power-driven vessel.

When a sailing vessel does not have right of way

A sailing vessel loses its priority over power-driven vessels in several situations. A sailing vessel using its engine — even if sails are also set — is classified as a power-driven vessel for right-of-way purposes. A sailing vessel overtaking a power-driven vessel must give way to that vessel. And a sailing vessel must give way to vessels that are not under command, restricted in their ability to maneuver, constrained by draft, engaged in fishing, or operating in a narrow channel where the sailing vessel can only navigate safely inside the channel — in the last case, the sailing vessel must not impede the power vessel navigating inside the channel.

What should a sailboat do when approaching a PWC?

A personal watercraft (PWC) is classified as a power-driven vessel under the navigation rules. A sailboat under sail has right of way over a PWC approaching from any direction except overtaking. The PWC is the give-way vessel and must keep clear. A sailboat approaching a PWC head-on should still alter to starboard as a precaution — a PWC operator may not know or follow the navigation rules and the ultimate responsibility for collision avoidance rests with both vessels. When a sailboat is approaching a powerboat or PWC with engines running, the sailing vessel is a power-driven vessel and crossing and head-on rules apply normally between two power vessels.

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The Full Vessel Hierarchy

Priority order for give-way

When the meeting situation rules (head-on, crossing, overtaking) do not determine who gives way — or when vessel type creates an additional priority — the navigation rules establish a hierarchy. From highest priority (stand-on) to lowest (give-way): vessels not under command (NUC) — those unable to maneuver due to exceptional circumstances; vessels restricted in their ability to maneuver (RAM) — dredges, vessels laying cable, vessels conducting replenishment operations; vessels constrained by draft — vessels that cannot deviate from their course due to available depth; vessels engaged in fishing — those using gear that restricts their maneuverability; vessels under sail; power-driven vessels.

Practical application for recreational boaters

For recreational boating, the hierarchy means: give way to commercial fishing vessels with gear deployed, give way to large vessels that cannot maneuver out of a channel, and give way to sailing vessels (when you are under power). A recreational powerboat gives way to all vessels above it in the hierarchy. A recreational sailboat under sail gives way only to NUC, RAM, constrained-by-draft, and fishing vessels — not to other pleasure craft under power. The hierarchy applies in addition to the meeting situation rules: an overtaking sailing vessel still gives way to the powerboat it is overtaking, despite being higher in the general hierarchy.

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Narrow Channels and Traffic Separation

The narrow channel rule

A vessel operating in a narrow channel or fairway — an inlet, a marked channel, a river — must keep as near to the outer limit of the channel on its starboard side as is safe and practicable. This keeps traffic separated the same way road traffic is separated, with each direction of travel on the right side of the channel. A vessel of less than 20 meters in length, or a sailing vessel, must not impede the passage of a vessel that can safely navigate only within the narrow channel. A boat operating in a narrow channel should not anchor in the channel if it can be avoided, and should not cross the channel in a way that impedes vessels navigating within it.

Traffic separation schemes

In high-traffic areas — major ports and shipping lanes — traffic separation schemes (TSS) divide traffic into lanes, with a separation zone between them. Recreational vessels should avoid traffic separation lanes when possible. When crossing a TSS, cross as nearly as practicable at right angles to the direction of traffic flow to minimize time in the lane. Do not anchor in a separation zone or in areas near the termination of a traffic separation scheme. A small recreational vessel crossing a busy shipping lane should treat the exercise the same way a pedestrian crosses a highway: know the traffic is coming, minimize crossing time, and do not stop in the lane.

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Passing Rules and Sound Signals

What side do you pass a boat on?

In a head-on situation, both vessels alter to starboard and pass port-to-port — each vessel passes on the other's left side. This is the default passing arrangement and mirrors road traffic convention. Port-to-port passing is standard for two vessels meeting head-on in open water and in channels. Starboard-to-starboard passing — each vessel passes on the other's right — is permitted when port-to-port passing is not practicable, but it requires both vessels to agree to the arrangement, typically communicated by sound signal. Never assume the other vessel will pass starboard-to-starboard without confirmation.

Sound signals for passing and maneuvering

The navigation rules require vessels to use sound signals in certain situations. In inland waters (rivers, harbors, and inland lakes), maneuvering signals are used to indicate what action is being taken: one short blast means altering course to starboard; two short blasts means altering course to port; three short blasts means operating astern propulsion. In a meeting or crossing situation in inland waters, the vessel initiating the maneuver proposes it with one or two blasts and the other vessel responds with the same signal to agree — or five or more short blasts to indicate danger or disagreement. In international waters (offshore), sound signals are used to indicate actions taken rather than proposed. A vessel required to use a whistle or horn must sound these signals when making maneuvers in meeting situations.

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When the Rules Can Be Departed From

When can a navigation rule be overlooked?

The navigation rules include Rule 2(b), which recognizes that strict compliance with the rules may not be possible in all circumstances: if following a specific rule would create greater danger than departing from it, departure is permitted. This provision exists for situations where a vessel is in immediate danger and the action required to avoid collision may not conform to the specific rule that would normally apply. However, Rule 2(b) is not a general permission to ignore the rules when they are inconvenient — it is a narrow provision for genuine emergencies where compliance would cause harm. A vessel departing from the rules under Rule 2(b) must give due regard to the dangers of navigation, the special circumstances including the limitations of the vessels involved, and must take whatever action best avoids collision.

When departure is and is not appropriate

Rule 2(b) departure is appropriate when, for example, a vessel is in a narrow channel and cannot alter to starboard as required without running aground — in that case, departure from the starboard-alteration requirement is justified by the danger it would create. It is not appropriate to depart from the give-way rules because following them would require inconvenient maneuvering, because the stand-on vessel is moving slowly, or because the operator of the give-way vessel believes the situation is under control. The test is whether strict compliance would create danger — not whether it would create inconvenience.

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Frequently Asked Questions

What are the boating right of way rules?

Boating right of way is determined by three factors: the type of meeting situation (head-on, crossing, or overtaking), the type of vessel, and the navigation environment. In a head-on situation, both vessels alter to starboard and pass port-to-port. In a crossing situation, the vessel with the other on its starboard side gives way. In an overtaking situation, the overtaking vessel always gives way. When vessel type creates priority, the hierarchy is: not under command, restricted in ability to maneuver, constrained by draft, fishing vessels, sailing vessels, power-driven vessels — from highest to lowest priority.

When crossing paths, what is the give-way vessel's responsibility?

The give-way vessel must take early and substantial action to keep well clear of the stand-on vessel. Early means acting before the situation becomes close-quarters — not waiting until a last-second turn is required. Substantial means a maneuver large enough that the stand-on vessel can clearly see that action is being taken. The preferred action for a give-way vessel in a crossing situation is a large alteration of course to starboard — turning right — to pass behind the stand-on vessel. Small speed reductions or minor course changes that are not clearly visible to the other vessel do not satisfy the give-way obligation.

One boat is overtaking another — which boat must give way?

The overtaking vessel must give way — always. The vessel being overtaken is the stand-on vessel and must maintain its course and speed. The overtaking vessel must keep clear of the vessel it is overtaking from the moment it begins the overtaking maneuver until it is past and completely clear. The overtaking rule applies regardless of vessel type: a sailing vessel overtaking a powerboat must give way to the powerboat. The overtaking vessel may pass on either side but must keep clear throughout.

In a crossing situation, which vessel gives way?

In a crossing situation between two power-driven vessels, the vessel that has the other on its starboard side is the give-way vessel. The vessel that has the other on its port side is the stand-on vessel. A simple rule: if another vessel is to your right and your courses will converge, you give way. If it is to your left, you stand on. When a sailing vessel and a power vessel cross, the powerboat is always the give-way vessel — the sailing vessel has priority in the vessel hierarchy regardless of which side the powerboat is approaching from, unless the sailing vessel is operating under engine power.

What side do you pass a boat on?

In a head-on or near-head-on situation, both vessels alter to starboard and pass each other on the port side — each passes to the left of the other. This port-to-port passing is the standard arrangement for two vessels meeting head-on. In a crossing situation, the give-way vessel turns to pass behind the stand-on vessel, which typically results in port-to-port passing as well. Starboard-to-starboard passing is permitted when port-to-port is not practicable, but both vessels must agree — in inland waters, this agreement is communicated by sound signal.

In the navigation rules, what must give-way boats do?

Give-way vessels must take early and substantial action to keep well clear. They must not pass ahead of the stand-on vessel if there is any risk of collision — the preferred action is to turn to starboard and pass behind. They must not make small, ambiguous maneuvers that the stand-on vessel cannot clearly interpret. They must act early enough that the stand-on vessel does not have to maneuver to avoid them. If the give-way vessel fails to act and collision becomes imminent, it has violated the navigation rules regardless of any other circumstances.

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